Even the union workers have long since left the city of Detroit. Pretty much all that are left are welfare recipients and the criminals who prey on them.
This is exactly what would happen if total state sovereignty were to be enforced by the states.
The moochers and criminals would stay in the “blue” states while all the productive people moved to better/freer states.
And, this is exactly why the collectivist “blues” insist on implementing their policies at the federal level - so we can’t escape and vote with our feet.